Second Life viewer sources 1.13.2.12

1 files changed, 111 insertions, 0 deletions

diff --git a/linden/indra/llmath/v2math.cpp b/linden/indra/llmath/v2math.cpp
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+++ b/linden/indra/llmath/v2math.cpp
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+/** 
+ * @file v2math.cpp
+ * @brief LLVector2 class implementation.
+ *
+ * Copyright (c) 2000-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#include "linden_common.h"
+
+//#include "vmath.h"
+#include "v2math.h"
+#include "v4math.h"
+#include "m4math.h"
+#include "m3math.h"
+#include "llquaternion.h"
+
+// LLVector2
+
+LLVector2 LLVector2::zero(0,0);
+
+
+// Non-member functions
+
+// Sets all values to absolute value of their original values
+// Returns TRUE if data changed
+BOOL LLVector2::abs()
+{
+        BOOL ret = FALSE;
+
+        if (mV[0] < 0.f) { mV[0] = -mV[0]; ret = TRUE; }
+        if (mV[1] < 0.f) { mV[1] = -mV[1]; ret = TRUE; }
+        
+        return ret;
+}
+
+
+F32 angle_between(const LLVector2& a, const LLVector2& b)
+{
+        LLVector2 an = a;
+        LLVector2 bn = b;
+        an.normVec();
+        bn.normVec();
+        F32 cosine = an * bn;
+        F32 angle = (cosine >= 1.0f) ? 0.0f :
+                                (cosine <= -1.0f) ? F_PI :
+                                acos(cosine);
+        return angle;
+}
+
+BOOL are_parallel(const LLVector2 &a, const LLVector2 &b, float epsilon)
+{
+        LLVector2 an = a;
+        LLVector2 bn = b;
+        an.normVec();
+        bn.normVec();
+        F32 dot = an * bn;
+        if ( (1.0f - fabs(dot)) < epsilon)
+        {
+                return TRUE;
+        }
+        return FALSE;
+}
+
+
+F32     dist_vec(const LLVector2 &a, const LLVector2 &b)
+{
+        F32 x = a.mV[0] - b.mV[0];
+        F32 y = a.mV[1] - b.mV[1];
+        return fsqrtf( x*x + y*y );
+}
+
+F32     dist_vec_squared(const LLVector2 &a, const LLVector2 &b)
+{
+        F32 x = a.mV[0] - b.mV[0];
+        F32 y = a.mV[1] - b.mV[1];
+        return x*x + y*y;
+}
+
+F32     dist_vec_squared2D(const LLVector2 &a, const LLVector2 &b)
+{
+        F32 x = a.mV[0] - b.mV[0];
+        F32 y = a.mV[1] - b.mV[1];
+        return x*x + y*y;
+}
+
+LLVector2 lerp(const LLVector2 &a, const LLVector2 &b, F32 u)
+{
+        return LLVector2(
+                a.mV[VX] + (b.mV[VX] - a.mV[VX]) * u,
+                a.mV[VY] + (b.mV[VY] - a.mV[VY]) * u );
+}